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在天气晴朗无风的海面上,常常会出现这种幻景,远方的船只或城市的景物送入你的眼帘时,你会感到这些景象都好象发生在空中一样.这种海市幻景(又称海市蜃楼)的形成是由于光的折射而产生的.夏天海面附近的温度比
In the sunny and windless sea, this kind of mirage often appears. When a distant ship or city scenery enters your eyes, you will feel that these scenes appear to be in the sky. The formation of a mirage is caused by the refraction of light. The temperature ratio near the summer sea surface